Radiotherapy laser positioning system performance test method, system and equipment

Abstract

The invention provides a radiation therapy laser positioning system performance test method, which can be applied to the technical field of medical equipment, and comprises the following steps: selecting measurement points on a laser line of a laser positioning system, and measuring the position coordinate of each measurement point; on the basis of the position coordinates of the measuring points, a fitting straight line in the X-axis direction, a fitting straight line in the Y-axis direction and a fitting straight line in the Z-axis direction of the laser positioning system are obtained; the straightness of a laser line of the laser positioning system and the perpendicularity of a laser cross positioning line are obtained through calculation; and measuring the distance deviation between the reference point determined by the laser positioning system and the reference point of the radiotherapy system to obtain a consistency test result of the reference points of the laser positioning system and the radiotherapy system. On the premise that the existing test requirements are met, the straightness of the laser rays, the perpendicularity of the laser cross curve and the positioning accuracy of the radiotherapy positioning laser system are improved. The invention also provides a radiation therapy laser positioning system performance test system and electronic equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a performance testing method, system and equipment for a radiotherapy laser positioning system. Background Art

[0002] As an important part of the radiotherapy system, the laser positioning system plays a vital role in the precise positioning of the patient's radiotherapy. As a medical device, its performance is not only directly related to the effectiveness and reliability of the medical device, but also directly affects the patient's treatment effect and life safety. At present, the test of the laser positioning system mainly adopts the method in YY / T 1537-2017 "Performance and Test Methods of Laser Positioning System for Radiotherapy". However, this method has the problems of complex methods or partial ambiguity and practical operation difficulties when testing the straightness of the laser line, the verticality of the laser cross line, and the positioning accuracy of the radiotherapy positioning laser system (consistency with the reference point) on site. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In order to solve at least one of the above technical problems in the laser positioning system test in the prior art, the embodiments of the present invention provide a method, system and device for testing the performance of a radiotherapy laser positioning system, and clarify the specific test methods for the straightness of the laser line in the laser positioning system, the verticality of the laser cross line, and the positioning accuracy (consistency with the reference point) of the radiotherapy positioning laser system. By using a laser tracker and a square phantom, the above three performance indicators can be tested at the same time, making the on-site testing of the laser positioning system more convenient and flexible.

[0005] (II) Technical solution

[0006] In view of the above technical problems, the embodiments of the present invention provide a method, system and device for testing the performance of a radiotherapy laser positioning system.

[0007] According to a first aspect of the present invention, a method for testing the performance of a radiotherapy laser positioning system is provided, comprising: selecting measurement points on a laser line of the laser positioning system, and measuring the position coordinates of each measurement point; obtaining a fitting straight line in the X-axis direction, a fitting straight line in the Y-axis direction, and a fitting straight line in the Z-axis direction of the laser positioning system based on the position coordinates of the measurement points; calculating the straightness and verticality of the laser positioning system based on the fitting straight line in the X-axis direction, the fitting straight line in the Y-axis direction, and the fitting straight line in the Z-axis direction; and measuring the distance deviation between a reference point determined by the laser positioning system and a reference point of the radiotherapy system to obtain a consistency test result between the laser positioning system and the reference point of the radiotherapy system, wherein the measurement points include an X-axis measurement point, a Y-axis measurement point, and a Z-axis measurement point.

[0008] In some exemplary embodiments, a measurement point is selected on the laser line of the laser positioning system, and the position coordinates of each measurement point are measured, including: placing a square phantom on the bed board of a patient support device; adjusting the square phantom so that the laser line coincides with the scale line on the square phantom to obtain a first measurement point; fixing the target ball of the laser tracker on the target seat of the square phantom; using the laser tracker to read the position coordinates at this time to obtain the position coordinates of the first measurement point; controlling the bed board of the patient support device to translate a preset distance along the X-axis direction path of the laser line to the position of the second measurement point; adjusting the square phantom so that the laser line coincides with the scale line on the phantom; using the laser tracker to read the position coordinates at this time to obtain the position coordinates of the second measurement point; and repeating the above steps to obtain the position coordinates of other measurement points in turn.

[0009] In some exemplary embodiments, the preset distance is not less than 10 cm; the number of X-axis measurement points is not less than 5; the number of Y-axis measurement points is not less than 5; and the number of Z-axis measurement points is not less than 5.

[0010] In some exemplary embodiments, calculating the straightness of the laser positioning system includes: calculating the distance between each X-axis measurement point and the fitting straight line in the X-axis direction to obtain the straightness measurement result of the laser positioning system along the X-axis direction; calculating the distance between each Y-axis measurement point and the fitting straight line in the Y-axis direction to obtain the straightness measurement result of the laser positioning system along the Y-axis direction; and calculating the distance between each Z-axis measurement point and the fitting straight line in the Z-axis direction to obtain the straightness measurement result of the laser positioning system along the Z-axis direction.

[0011] In some exemplary embodiments, calculating the verticality of the laser positioning system includes: calculating the angle between the fitting straight line in the X-axis direction and the fitting straight line in the Y-axis direction to obtain the XY angle; calculating the angle between the fitting straight line in the X-axis direction and the fitting straight line in the Z-axis direction to obtain the XZ angle; calculating the angle between the fitting straight line in the Y-axis direction and the fitting straight line in the Z-axis direction to obtain the YZ angle; and obtaining the verticality of the laser positioning system based on the XY angle, the XZ angle and the YZ angle.

[0012] In some exemplary embodiments, measuring the distance deviation between a reference point of a radiotherapy system and a reference point determined by a laser positioning system includes: setting the position coordinates of the reference point of the radiotherapy system as the origin of a laser tracker; and using a laser tracker to measure the position coordinates of the reference point of the laser positioning system to obtain the position coordinates of the reference point of the laser positioning system, wherein the position coordinates of the reference point of the laser positioning system are the distance deviation between the reference point of the laser positioning system and the reference point of the radiotherapy system.

[0013] In some exemplary embodiments, using a laser tracker to measure the position coordinates of a reference point of a laser positioning system includes: placing a square phantom on a bed board of a patient support device, adjusting the patient support device so that the square phantom is at a reference point determined by the laser positioning system; placing a target ball on a target seat on the upper surface of the square phantom; manually fine-tuning the square phantom so that the scale lines on the side of the square phantom coincide with the X-axis direction and the Y-axis direction of the laser positioning system, respectively; using a laser tracker to measure the X-value and Y-value of the target ball position to obtain the X-axis coordinate and the Y-axis coordinate of the reference point of the laser positioning system; placing the target ball on the upper surface of the square phantom, measuring the Z-axis value with a laser tracker, and obtaining a first Z-axis coordinate; placing the target ball close to the square phantom on the bed board of the patient support device, measuring the Z-axis value with a laser tracker, and obtaining a second Z-axis coordinate; and calculating the Z-axis coordinate of the reference point of the laser positioning system based on the first Z-axis coordinate, the second Z-axis coordinate, and the radius of the target ball.

[0014] In some exemplary embodiments, each surface of the square phantom is provided with scale lines of a plane rectangular coordinate system; the center of each surface of the square phantom is the origin of the plane rectangular coordinate system; and a target seat is provided at the center of the upper surface of the square phantom, and the target seat is used to place the target ball of the laser tracker.

[0015] According to a second aspect of the present invention, a radiotherapy laser positioning system performance test system is provided, comprising: a first measurement module, used to select measurement points on the laser line of the laser positioning system and measure the position coordinates of each measurement point; a linear fitting module, used to obtain the fitting straight line in the X-axis direction, the Y-axis direction and the Z-axis direction of the laser positioning system based on the position coordinates of the measurement points; a calculation module, used to calculate the straightness and verticality of the laser positioning system based on the fitting straight line in the X-axis direction, the Y-axis direction and the Z-axis direction; and a second measurement module, used to measure the distance deviation between the reference point determined by the laser positioning system and the reference point of the radiotherapy system, and obtain the consistency test result of the laser positioning system and the reference point of the radiotherapy system, wherein the measurement points include X-axis measurement points, Y-axis measurement points and Z-axis measurement points.

[0016] According to a third aspect of the present invention, an electronic device is provided, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is executed by the processor to implement the above method.

[0017] (III) Beneficial effects

[0018] It can be seen from the above technical solutions that the radiotherapy laser positioning system performance testing method, system and device provided by the embodiments of the present invention have at least the following beneficial effects:

[0019] (1) The specific test methods for the straightness of the laser line in the laser positioning system, the verticality of the laser cross line, and the positioning accuracy (consistency with the reference point) of the radiotherapy positioning laser system were clarified, which improved the consistency of the test results.

[0020] (2) The laser tracker and square phantom can be used to simultaneously measure the three performance indicators of the laser line straightness, the laser cross line verticality, and the laser positioning system positioning accuracy (consistency with the reference point), making on-site testing more convenient and flexible.

[0021] (3) By utilizing the high-precision micro-motion control characteristics of the patient support device, it is only necessary to fine-tune the alignment of the square phantom scale lines with the laser lines, thereby reducing the time cost and error of manual positioning phantom measurement and greatly improving the efficiency of on-site testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above contents and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0023] Figure 1 A schematic diagram of a process flow of a method for testing the performance of a radiotherapy laser positioning system according to an embodiment of the present invention is shown;

[0024] Figure 2 A schematic diagram of a process of selecting a measurement point on a laser line of a laser positioning system and measuring the position coordinates of each measurement point according to an embodiment of the present invention is shown;

[0025] Figure 3 A schematic diagram of a laser positioning system test arrangement according to an embodiment of the present invention is shown;

[0026] Figure 4 A schematic diagram of the structure of a square phantom according to an embodiment of the present invention is shown;

[0027] Figure 5 A schematic diagram schematically shows a flow chart of measuring a distance deviation between a reference point determined by a laser positioning system and a reference point of a radiotherapy system according to an embodiment of the present invention;

[0028] Figure 6 A schematic diagram of a process of measuring the position coordinates of a reference point of a laser positioning system using a laser tracker according to an embodiment of the present invention is schematically shown;

[0029] Figure 7 A structural block diagram of a radiotherapy laser positioning system performance test system according to an embodiment of the present invention is schematically shown; and

[0030] Figure 8A block diagram of an electronic device for a radiotherapy laser positioning system performance testing method according to an embodiment of the present invention is schematically shown.

[0031] Reference numerals:

[0032] 1-laser locator; 2-patient support device; 3-square phantom; 31-target seat; 32-plane rectangular coordinate system. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Figure 1 The flowchart of a method for testing the performance of a radiotherapy laser positioning system according to an embodiment of the present invention is schematically shown.

[0035] Depend on Figure 1 It can be seen that a radiotherapy laser positioning system performance testing method according to an embodiment of the present invention includes steps S110-S140.

[0036] In step S110, a measurement point is selected on the laser line of the laser positioning system, and the position coordinates of each measurement point are measured, wherein the measurement points include X-axis measurement points, Y-axis measurement points, and Z-axis measurement points. Optionally, the number of X-axis measurement points is not less than 5; the number of Y-axis measurement points is not less than 5; and the number of Z-axis measurement points is not less than 5.

[0037] In some exemplary embodiments, step S110 includes steps S111-S119, see Figure 2 ,

[0038] In step S111, the square phantom 3 is placed on the bed board of the patient support device 2. Figure 3 .

[0039] Figure 4 The schematic diagram of the structure of the square phantom 3 according to the embodiment of the present invention is shown schematically.

[0040] Depend on Figure 4It can be seen that according to the embodiment of the present invention, each surface of the square phantom 3 is provided with scale lines of the plane rectangular coordinate system 32; the center of each surface of the square phantom 3 is the origin of the plane rectangular coordinate system 32; and the center of the upper surface of the square phantom 3 is provided with a target seat 31, and the target seat 31 is used to place the target ball of the laser tracker.

[0041] For example, the size of the square mold body 3 is 10cm*10cm*10cm, and each surface is an epoxy resin module with scale lines (line groove width 1mm), and a laser tracker target seat 31 is set in the center of the upper surface of the square mold body 3.

[0042] In step S112, the square phantom 3 is adjusted so that the laser line coincides with the scale line on the square phantom 3, thereby obtaining the first measurement point.

[0043] In step S113 , the target ball of the laser tracker is fixed on the target seat 31 of the square phantom 3 .

[0044] In step S114, the position coordinates at this time are read using a laser tracker to obtain the position coordinates of the first measurement point.

[0045] In step S115, the bed board of the patient support device 2 is controlled to translate a preset distance along the X-axis direction of the laser line to the second measuring point position. Optionally, the preset distance is not less than 10 cm.

[0046] In step S116, the square phantom 3 is adjusted so that the laser line coincides with the scale line on the phantom.

[0047] In step S117, the position coordinates at this time are read using a laser tracker to obtain the position coordinates of the second measurement point.

[0048] In step S118, steps S115 to S117 are repeatedly executed to obtain the position coordinates of other measurement points in the X-axis direction.

[0049] In step S119, steps S111 to S118 are repeatedly executed to obtain the position coordinates of the measurement point in the Y-axis direction and the position coordinates of the measurement point in the Z-axis direction.

[0050] In step S120, based on the position coordinates of the measurement point, a fitting straight line in the X-axis direction, a fitting straight line in the Y-axis direction, and a fitting straight line in the Z-axis direction of the laser positioning system are obtained.

[0051] For example, the laser tracker software is used to fit the obtained X-axis measurement points into a straight line.

[0052] In step S130, the straightness and verticality of the laser positioning system are calculated based on the fitting straight line in the X-axis direction, the fitting straight line in the Y-axis direction, and the fitting straight line in the Z-axis direction.

[0053] In some exemplary embodiments, calculating the straightness of the laser positioning system includes: calculating the distance between each X-axis measurement point and the fitting straight line in the X-axis direction to obtain the straightness measurement result of the laser positioning system along the X-axis direction; calculating the distance between each Y-axis measurement point and the fitting straight line in the Y-axis direction to obtain the straightness measurement result of the laser positioning system along the Y-axis direction; and calculating the distance between each Z-axis measurement point and the fitting straight line in the Z-axis direction to obtain the straightness measurement result of the laser positioning system along the Z-axis direction. The straightness in each direction should not exceed 0.5 mm.

[0054] In some exemplary embodiments, calculating the verticality of the laser positioning system includes: calculating the angle between the fitting straight line in the X-axis direction and the fitting straight line in the Y-axis direction to obtain the XY angle; calculating the angle between the fitting straight line in the X-axis direction and the fitting straight line in the Z-axis direction to obtain the XZ angle; calculating the angle between the fitting straight line in the Y-axis direction and the fitting straight line in the Z-axis direction to obtain the YZ angle; and obtaining the verticality of the laser positioning system based on the XY angle, the XZ angle and the YZ angle. Optionally, the above-mentioned angles can be calculated in the laser tracker software, and the verticality test result should not be greater than 0.2°.

[0055] In step S140, the distance deviation between the reference point determined by the laser positioning system and the reference point of the radiotherapy system is measured to obtain a consistency test result of the reference point of the laser positioning system and the radiotherapy system.

[0056] In some exemplary embodiments, step S140 includes steps S141-S142, see Figure 5 .

[0057] In step S141, the position coordinates of the reference point of the radiotherapy system are set as the origin of the laser tracker.

[0058] In step S142, a laser tracker is used to measure the position coordinates of a reference point of the laser positioning system to obtain the position coordinates of the reference point of the laser positioning system, wherein the position coordinates of the reference point of the laser positioning system are the distance deviation between the reference point of the laser positioning system and the reference point of the radiotherapy system.

[0059] In some exemplary embodiments, step S142 includes steps S1421-S1427, see Figure 6 .

[0060] In step S1421 , the square phantom 3 is placed on the bed board of the patient support device 2 , and the patient support device 2 is adjusted so that the square phantom 3 is at the reference point determined by the laser positioning system.

[0061] In step S1422 , the target ball is placed on the target seat 31 on the upper surface of the square phantom 3 .

[0062] In step S1423, the square phantom 3 is manually fine-tuned so that the scale lines on the side of the square phantom 3 coincide with the X-axis direction and the Y-axis direction of the laser positioning system respectively.

[0063] In step S1424, the X value and Y value of the target ball position are measured using a laser tracker to obtain the X-axis coordinate and Y-axis coordinate of the reference point of the laser positioning system.

[0064] In step S1425, the target ball is placed on the upper surface of the square phantom 3, and the Z-axis value is measured using a laser tracker to obtain a first Z-axis coordinate.

[0065] For example, place the target ball on the upper surface of the square phantom 3 and use a laser tracker to measure the z value at this time, which is recorded as Z 上 , place the target ball close to the lower surface of the square phantom 3 (i.e., the surface of the bed board of the patient support device 2), and use a laser tracker to measure the Z value at this time, which is recorded as Z 下 , the radius of the target sphere is known to be R, and the Z value of the reference point of the laser positioning system is recorded as Z 0 , Z 0 =[(Z 上 -R)+(Z 下 -R)]÷2, which is the distance deviation between the laser positioning system in the Z direction and the reference point.

[0066] In step S1426, the target ball is placed on the bed board of the patient support device 2 close to the square phantom 3, and the Z-axis value is measured with a laser tracker to obtain a second Z-axis coordinate.

[0067] In step S1427, the Z-axis coordinate of the reference point of the laser positioning system is calculated based on the first Z-axis coordinate, the second Z-axis coordinate and the radius of the target sphere.

[0068] The test method of the embodiment of the present invention can simultaneously measure the three performance indicators of the straightness of the laser line, the verticality of the laser cross line, and the positioning accuracy of the laser positioning system (consistency with the reference point) by using the laser tracker and the square phantom 3, making the on-site test more convenient and flexible. In addition, by using the high-precision fine motion control characteristics of the patient support device 2 itself, it is only necessary to fine-tune the alignment of the scale line of the square phantom 3 with the laser line, which reduces the time cost and error of manual positioning phantom measurement and greatly improves the efficiency of on-site testing.

[0069] Figure 7 The structure block diagram of a radiotherapy laser positioning system performance test system according to an embodiment of the present invention is schematically shown.

[0070] like Figure 7As shown, the radiotherapy laser positioning system performance testing system 800 according to an embodiment of the present invention includes a first measurement module 810 , a linear fitting module 820 , a calculation module 830 and a second measurement module 840 .

[0071] The first measurement module 810 is used to select measurement points on the laser line of the laser positioning system and measure the position coordinates of each measurement point, wherein the measurement points include X-axis measurement points, Y-axis measurement points and Z-axis measurement points.

[0072] The linear fitting module 820 is used to obtain the fitting straight line in the X-axis direction, the Y-axis direction and the Z-axis direction of the laser positioning system based on the position coordinates of the measurement point.

[0073] The calculation module 830 is used to calculate the straightness and verticality of the laser positioning system based on the fitting straight line in the X-axis direction, the fitting straight line in the Y-axis direction and the fitting straight line in the Z-axis direction.

[0074] The second measurement module 840 is used to measure the distance deviation between the reference point determined by the laser positioning system and the reference point of the radiotherapy system, and obtain the consistency test result of the reference point of the laser positioning system and the radiotherapy system.

[0075] In some specific embodiments, any multiple modules among the first measurement module 810, the linear fitting module 820, the calculation module 830 and the second measurement module 840 can be combined into one module for implementation, or any one of the modules can be split into multiple modules. Alternatively, at least part of the functions of one or more of these modules can be combined with at least part of the functions of other modules and implemented in one module.

[0076] In some specific embodiments, at least one of the first measurement module 810, the linear fitting module 820, the calculation module 830 and the second measurement module 840 may be at least partially implemented as a hardware circuit, such as a field programmable gate array (FPGA), a programmable logic array (PLA), a system on a chip, a system on a substrate, a system on a package, an application specific integrated circuit (ASIC), or may be implemented by hardware or firmware in any other reasonable manner of integrating or packaging the circuit, or implemented in any one of the three implementation modes of software, hardware and firmware or in any appropriate combination of any of them. Alternatively, at least one of the first measurement module 810, the linear fitting module 820, the calculation module 830 and the second measurement module 840 may be at least partially implemented as a computer program module, and when the computer program module is run, the corresponding function may be executed.

[0077] Figure 8A block diagram of an electronic device for a radiotherapy laser positioning system performance testing method according to an embodiment of the present invention is schematically shown.

[0078] like Figure 8 As shown, the electronic device 600 according to an embodiment of the present disclosure includes a processor 601, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage part 608 to a random access memory (RAM) 603. The processor 601 may include, for example, a general-purpose microprocessor (such as a CPU), an instruction set processor and / or a related chipset and / or a special-purpose microprocessor (for example, an application-specific integrated circuit (ASIC)), etc. The processor 601 may also include an onboard memory for caching purposes. The processor 601 may include a single processing unit or multiple processing units for performing different actions of the method flow according to an embodiment of the present disclosure.

[0079] In RAM603, various programs and data required for the operation of electronic device 600 are stored. Processor 601, ROM602 and RAM603 are connected to each other via bus 604. Processor 601 performs various operations of the method flow according to the embodiment of the present disclosure by executing the program in ROM602 and / or RAM603. It should be noted that the program can also be stored in one or more memories other than ROM602 and RAM603. Processor 601 can also perform various operations of the method flow according to the embodiment of the present disclosure by executing the program stored in one or more memories.

[0080] In some specific embodiments, the electronic device 600 may further include an input / output (I / O) interface 605, which is also connected to the bus 604. The electronic device 600 may further include one or more of the following components connected to the I / O interface 605: an input portion 606 including a keyboard, a mouse, etc.; an output portion 607 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage portion 608 including a hard disk, etc.; and a communication portion 609 including a network interface card such as a LAN card, a modem, etc. The communication portion 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as needed. A removable medium 611, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 610 as needed, so that a computer program read therefrom is installed into the storage portion 608 as needed.

[0081] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for testing the performance of a radiotherapy laser positioning system, characterized in that: include: Selecting measurement points on the laser line of the laser positioning system and measuring the position coordinates of each measurement point; Based on the position coordinates of the measuring point, a fitting straight line in the X-axis direction, a fitting straight line in the Y-axis direction, and a fitting straight line in the Z-axis direction of the laser positioning system are obtained; Based on the fitting straight line in the X-axis direction, the fitting straight line in the Y-axis direction and the fitting straight line in the Z-axis direction, the straightness and verticality of the laser positioning system are calculated; as well as Measure the distance deviation between the reference point determined by the laser positioning system and the reference point of the radiotherapy system to obtain the consistency test results of the reference point of the laser positioning system and the radiotherapy system. The measuring points include an X-axis measuring point, a Y-axis measuring point and a Z-axis measuring point.

2. The method according to claim 1, characterized in that The selecting of measuring points on the laser line of the laser positioning system and measuring the position coordinates of each measuring point comprises: Place the square phantom on the bed board of the patient support device; Adjust the square phantom so that the laser line coincides with the scale line on the square phantom to obtain the first measurement point; Fixing the target ball of the laser tracker on the target seat of the square phantom; Use a laser tracker to read the position coordinates at this time to obtain the position coordinates of the first measurement point; Control the bed plate of the patient support device to translate a preset distance along the X-axis direction of the laser line to the position of the second measuring point; Adjust the square phantom so that the laser line coincides with the scale line on the phantom; Use a laser tracker to read the position coordinates at this time to obtain the position coordinates of the second measurement point; and Repeat the above steps to obtain the position coordinates of other measurement points in turn.

3. The method according to claim 2, characterized in that The preset distance is not less than 10 cm; The number of X-axis measurement points is not less than 5; The number of the Y-axis measurement points is not less than 5; and The number of the Z-axis measurement points is no less than 5.

4. The method according to claim 1, characterized in that: The straightness of the laser positioning system obtained by calculation includes: Calculating the distance between each X-axis measurement point and the fitting straight line in the X-axis direction to obtain a straightness measurement result of the laser positioning system along the X-axis direction; Calculating the distance between each of the Y-axis measurement points and the fitting straight line in the Y-axis direction to obtain a straightness measurement result of the laser positioning system along the Y-axis direction; and The distance between each Z-axis measurement point and the fitting straight line in the Z-axis direction is calculated to obtain the straightness measurement result of the laser positioning system along the Z-axis direction.

5. The method according to claim 1, characterized in that Calculating the verticality of a laser positioning system includes: Calculate the angle between the fitting straight line in the X-axis direction and the fitting straight line in the Y-axis direction to obtain the XY angle; Calculate the angle between the fitting straight line in the X-axis direction and the fitting straight line in the Z-axis direction to obtain the XZ angle; Calculating the angle between the fitting straight line in the Y-axis direction and the fitting straight line in the Z-axis direction to obtain a YZ angle; and Based on the XY angle, the XZ angle and the YZ angle, the verticality of the laser positioning system is obtained.

6. The method according to claim 1, characterized in that The distance deviation between the reference point of the measuring radiotherapy system and the reference point determined by the laser positioning system includes: Setting the position coordinates of the reference point of the radiotherapy system as the origin of the laser tracker; and Use a laser tracker to measure the position coordinates of the reference point of the laser positioning system to obtain the position coordinates of the reference point of the laser positioning system. The position coordinates of the reference point of the laser positioning system are the distance deviation between the reference point of the laser positioning system and the reference point of the radiotherapy system.

7. The method according to claim 6, characterized in that The method of using a laser tracker to measure the position coordinates of a reference point of a laser positioning system comprises: Place the square phantom on the bed board of the patient support device, and adjust the patient support device so that the square phantom is at the reference point determined by the laser positioning system; Place the target ball on the target seat on the upper surface of the square phantom; Manually fine-tune the square phantom so that the scale lines on the side of the square phantom coincide with the X-axis and Y-axis directions of the laser positioning system respectively; Use a laser tracker to measure the X and Y values ​​of the target ball position to obtain the X-axis coordinate and Y-axis coordinate of the reference point of the laser positioning system; The target ball is placed on the upper surface of the square phantom, and the Z-axis value is measured with a laser tracker to obtain the first Z-axis coordinate; Place the target ball close to the square phantom on the bed board of the patient support device, measure the Z-axis value with a laser tracker, and obtain the second Z-axis coordinate; and The Z-axis coordinate of the reference point of the laser positioning system is calculated based on the first Z-axis coordinate, the second Z-axis coordinate and the radius of the target sphere.

8. The method according to claim 2 or 7, characterized in that: Each surface of the square phantom is provided with scale lines of a plane rectangular coordinate system; The center of each surface of the square phantom is the origin of the plane rectangular coordinate system; and A target seat is arranged at the center of the upper surface of the square phantom, and the target seat is used for placing a target ball of a laser tracker.

9. A radiotherapy laser positioning system performance test system, characterized in that: The system comprises: A first measurement module is used to select measurement points on the laser line of the laser positioning system and measure the position coordinates of each measurement point; A linear fitting module, used for obtaining a fitting straight line in the X-axis direction, a fitting straight line in the Y-axis direction, and a fitting straight line in the Z-axis direction of the laser positioning system based on the position coordinates of the measuring point; a calculation module, configured to calculate the straightness and verticality of the laser positioning system based on the fitting straight line in the X-axis direction, the fitting straight line in the Y-axis direction, and the fitting straight line in the Z-axis direction; and The second measurement module is used to measure the distance deviation between the reference point determined by the laser positioning system and the reference point of the radiotherapy system, and obtain the consistency test result of the reference point of the laser positioning system and the radiotherapy system. The measuring points include an X-axis measuring point, a Y-axis measuring point and a Z-axis measuring point.

10. An electronic device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method according to any one of claims 1 to 8.

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